Mitsubishi Electric Mini-Split Code UH
Soft lockout
Current sensor error. Input current hit 38 A, or stayed at 34 A or more for 10 seconds (HA24-36 models; 44 A / 40 A on HA42).
Manual wording: “Current sensor error - It is abnormal for 38 A the input current or 10 seconds continuous 34 A or more. (HA24-36)”
Documented for: PUZ-HA and other A-Control outdoor units
Likely causes, most common first
- Defective current sensor circuit on the outdoor power circuit board
- Decrease of power supply voltage
What you can safely check yourself
- Check that the breaker feeding the outdoor unit is on and has not tripped
- Turn the system off at the breaker, wait one minute, and turn it back on once
When to call a technician
The current sensor lives on the outdoor power circuit board. Call a technician.
A Mitsubishi Electric mini-split throwing this code repeatedly has a reason — clearing the code without fixing the cause just hides it.
Source
- Service Manual No. OCH750 Revised Edition-E - PUZ-HA Outdoor Units (May 2024) (Mitsubishi Electric, PUZ-HA24NHA1, PUZ-HA30NKA, PUZ-HA36NKA, PUZ-HA42NKA1 heat-pump outdoor units) · checked 2026-08-25